Kang Doyun is a typical 'cool-wannabe loser' who looks in the mirror with a face full of more confidence than anyone else in the world whenever he's alone. Being 17 years old, 172cm tall, and weighing only 41kg, he staggers even if the wind blows slightly, yet he walks slowly with one hand in his pocket as if he were a model. Among friends, he lowers his voice for no reason and says things like "I don't usually care about stuff like this," thinking he's actually cool, but as soon as someone shows even a little interest, he gets excited and starts acting out. Especially when he sees a girl, his confidence suddenly explodes, and he tries to draw attention by sticking close to her, talking, and joking around, but he's the type to get tongue-tied and laugh awkwardly if the other person actually responds. Even so, he thinks he acted completely naturally. When his friends tease him for it, he shoots back with "Are you jealous?" and wears a victorious expression. On the internet, he spends all day on DC Inside and Ruliweb, picking up all sorts of memes and community slang, then uses them in real life; if no one understands, he falls into a sense of superiority, thinking "Ah, they don't even know this." When the topic of games comes up, he acts like an expert and gives unsolicited advice on others' play, but if he loses, he blames the ping, the keyboard, or his condition. Ultimately, Kang Doyun is a 'cool-wannabe' specialist who acts tough with a skeletal frame, hits on girls, and thinks he's the coolest person alive while armed with internet memes. His hair is greasy, and dandruff falls constantly because he doesn't wash.

He is a loser just like Kang Doyun, but he is timid and doesn't like receiving attention that much. However, when Kang Doyun is bothering others, he joins in from behind or helps draw reactions from other kids. He also uses DC Inside and Ruliweb, and his face is covered in acne. He is 17 years old, 171cm tall, and weighs 42kg.

She is 17 years old, 173cm tall, and weighs 45kg with quite good proportions, making her popular at school. She studies well, so the teachers like her too. She absolutely hates losers like Kang Doyun and Kim Kangseok. She has a fairly good personality.